Electric water heater



c; M.n oswomn AND A. G.' BoEsEL. ELECTMC WATER HEATER.. APPLICATION fIlED MIGG IMQ.

1,415,015,` mamma11115111922.

.52 SHEES-SHEH I. y

C. M. BOSWORTHANDA. G. BOESEL.

ELECTRIC WATER HEATER. APPLICATION man ^ue.6. 1919*.

Patented May 9, 1922.

2 SHEETS-SHEET 2.

MTOEL Beesel invented a new and asl i United States, respectively,

UNITED STATESPATENT ori-loaf cYnUs 1u. BosWo-RTH, or CLEVELAND,

.AND ALGYSIUS G. '.BOESTllIlZ,` OF CLEVE- LAND HEIGHTS, oHro.

v y ELECTRIC WATER HEATER.

To all whom 'it may concern.'

Be it known that we, CYRUs M. Boswou'rn and ALoYsIUs G. BoEsnL,y citizens of the and residents of Cleveland and Cleveland Heights, county of and State of Ohio, have jointly useful Improvement in Electric' Water Heaters, of which the following isa specification, the principleof the invention being herein explained and the best mode in which we have contemplated applying that principle, so as to distinguish it from other inventions.

The present invention relates as indicated to water heaters and more particularly to one in which the water is heated by means of an electrically heated element installed in the water circuit between ,the supply and tbe storage tank, and also to means for automatically cont-rolling the temperature of the water. The heater is attached to the water Cuyahoga,

tank in a manner similar to the attachment The annexed drawing and the followingdescription set forth in detailcertai mechanism embodying the invention, such disclosed means constituting, however, but one of various mechanical forms in which the principle of the invention may be used.

In said annexed drawings Fig. 1 is an elevation of a storage tank showing my heating device attached thereto. Fig. 2 is an elevation of the heating element showing the casing in section. Fig. 3 lis a lsection at right angles to that of Fig. 2. Fig.' 4 is a section'on the line 4--4 Fig. 3. Fig. 5 is an elevation of the regulator. Fig. 6 is a section on the line 6-6 Fig. 5. Fig. 7 is a plan view of one of the members of the regulator. Fig. 8 is a section through the switch and Fig. 9 is a modified form of v lhousing for the thermostat. A

Specification of Letters Patent.

' circuitV of-resistangwire tending into member 7 provided heat-.conducting material. Embedded-in the channel-shaped portion 53 of the member 7 is the heating element proper-.comprising a filler of insulating material, such-.as enamel or the'like. A boss or projection 9 integral with fins or flanges 8 of:

54 embedded in ai Patented May 9, v1922. Application led August 6, 1919. vlSerial No. 315,586.' l

with the resistor 6 passes through theupper wall 10 of the casing. 5 and isthreaded at its outer end to engage a packing nut 11. A washer '12 v,and packing 13 are provided whereby a water-tight joint is formed between the casing 5 and the resistor6. The

boss 9 is rovidedwith a passage way 9, through w ich wires are passed to the heatlng element. The passageway 9 is also filled with an insulating material similar to that with which the channel 53 is filled.

Passing through the wall 14 of the casing' l beneath the resistor 6v and exthe interior thereof is a shaft 15. A thermostatic coil 16 is spirally coiled about the shaft 15 having its inner end attached thereto. The outer end of the coil 16 is riveted or otherwise connected to a plate 17 bolted to the lower surfacev 18 of the casing 5. Apin 19 and movement of the coil 16 along the shaftpl. The lowermost portion of the casing 5 is enlarged and has screw threaded engagement with a base piece 21 which is connected to the inlet pipe 3. 4As will be seen this con- 5 at a point a washer 2() prevent.

struction provides an entirely closed-in caswise cut in the surface thereof. Al dog or operating lever 28, recess 29 is adapted to fit the portion 26 of the shaft 15, and is provided with a keyway 30 having a key 29 adapted to engage one of the slots 27 in the portion 26 by means of whichany movement of the shaft 15 is imparted to the dog 28. An arm 31 extends from the dog 28 and has a projection 32 extending from the upper end thereof at right angles to the plane of'such dog.

Mounted on the shaft vided with calibrations 34 indicating progressive. degrees of temperatures, the calibrations corresponding' to the nunber of having a complementary j 15 is a dial 33 proslots-in the rusto conical shaped portion 26.

A pin passes throughthe dial 33 and engages a hole 36 in the portion 26 on the shaft l5@ The outer end 37 of the shaft is threaded and is pro-vided with a wine' nut 38 whereby they dial 33 and the dog are held in engagement on thefshatt 15. This combination oi parts, together with 'the switch to be described, orms auneans of regulating the temperature of the resistor.

Supported on the wallf14l ofthe casing 5 is a switch 40 provided with contact members 4l and 42 and having inovably mounted therein the usual spring controlled circuit breaker delovably mounted upon thev center 44 in switch 40 is an operating arm 45 approximately triangular in shape having two projecting ears or lugs which are adapted to be engaged by the projection 32 eitending from the upperV end ot the dog 28.

A housing surrounds the casing' 5, and is provided with a door 5.1, whereby adjust ments can be made to switch or regulator.

By meansl oit the combination above deA A`scrilxd, it is possible tocontrol the temperal. -lator. The thermostat The base piece 64.--

ture of the water between predetermined de# grees since any movement oit the thermostat coil 16 Willrotate the sha-tt 15, which in turn will move the arm 31 of the dog 28. The projection 32 on the arm 31 contacts with either one of the lugs 46 of the switch opf erating arm 45 and opens or closes the switch 45, depending on whether the thermostat is e'rpanding or contracting.

The lever arm 31 can be set at any degree of temperature .it is desiredto heat the water, by removing the dog 28 from the portion 26 and fittinor the key 30 into lthe milled slot 27 corresponding to the temperature delsired.4 By this means, while a certain range of movementis .at all times permitted the arm 31 before it contacts with the lugs 46 on the switch operating lever 45, either to close or break the'circuit, at which such closing or breaking occurs may he varied as desired.

As soon as the water has cooled somewhat the thermostatcontracts and rocks the arm 15 in a reverse direction until the lug 32 on 'the arm 31 again contacts th switch-operating lever perature is maintained in the storage tank.

In Fig. 9, we have shown a modied form of mounting for the thermostatv and regu- 60-is coiled about a shaft 61o corresponding to the shaft 15 and has its inner end engaging a slot 62 therein. The outer end of the thermostat coil engages a pin or stud 63 carried-by a base piece 64. has threaded engagement with a housing 65 adapted; to enclose "the thermostat 60 and close it off4 from Ithe water passage .in the casing 5. The' housing 65 the temperaturev 45 and closes thecircuit.v Byl this means an 'approximately' constant'temof the regulator is the same as that employed on the previously described form.

As will be seen from the above description and the drawings we have constructed water heater for storage tanks which is simple in construction and operation, and one in which the temperature is automatically controlled at a predetermined temperature. The device is ot few parts and is adapted to be installed in the system without any changes in the piping as used for the ordinary gas heaters in use at the present time.

@ther modes of applying the principle of our invention may loe employed instead of the one explained, change being made as regards the vmechanism herein disclosed,'pro vided this means stated by any of `following claims or the equivalent of such stated vmeans be employed. l

"l e "therefore particularly point out and distinctly claim as our invention l. ln an electricalA heating device 'for water systems of the character described, the combination of a thermostat disposed within said device, and a regulator operatively connected to said thermostat, said regulator comprising a frustofconical shaped portion, and a switch operating lever adjustably mounted on said truste-conical shaped portion.A

ter systems of the-character described, the combination of a thermostat disposedl within said device, and a regulator operatively 2. lnlan electrical heating device Afor waconnected to saidvthermostat, said regulator comprising a frusto-conic'al shaped portion, having slots therein, a switch operating le* ver having a key adapted to engage one o such slots in said frusto-conical-'shaped portion and a dial attached to said truste-conical shaped portion. f

3. In an electrical heating device for water systems of the character described, the combination of a thermostat disposed withiny said device, and a regulator operatively connected to said thermostat, said regulator c compr1sing a truste-conical shaped portion,

having slots therein, a switch operating -lever havin a key adapted to engage one of such slots 1n said frusto-conical shaped portion and a dial attached to saidfriisto-conical Shaped portion, the calibrations on said dial corresponding .to such slots on said frusto-conical shaped portion.

4; 'In an electrical heatingvdevice for water systems of Athe character described, the combination of a -thermostat disposed within sa1d device, and aregulator operatively connected to said thermostat, said regulator comprising a frusto-conical shaped portion, havmg slots therein, a Switch operating lever having akeyI adapted to engage 'one of 130 in said casing, a housing adapted to contain a fluid mounted Within said casing, a.

thermostat disposed Within said housing, a `15 regulator mounted on said housing, said regulator being operatively connected to said thermostat, and a switch adapted to` be opened and closed by said regulator at a predetermined thermal condition ofthe Huid 20 in said casing.

' Signed by us this 4th day of August, 1919.

CYRUS M. BOSWORTH. ALOYSIUS G. BOESEL. 

